100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _HW_IOBUS_C_
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#define _HW_IOBUS_C_
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#ifndef STATIC_INLINE_HW_IOBUS
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#define STATIC_INLINE_HW_IOBUS STATIC_INLINE
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#endif
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#include "device_table.h"
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/* DEVICE
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iobus - simple bus for attaching devices
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DESCRIPTION
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IOBUS provides a simple `local' bus for attaching (hanging)
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programmed IO devices from. All child devices are directly mapped
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into this devices parent address space (after checking that the
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attach address lies within the <<iobus>> address range. address).
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PROPERTIES
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None.
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*/
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static void
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hw_iobus_attach_address_callback(device *me,
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attach_type type,
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int space,
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unsigned_word addr,
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unsigned nr_bytes,
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access_type access,
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device *client) /*callback/default*/
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{
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int attach_space;
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unsigned_word attach_address;
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/* sanity check */
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if (space != 0)
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device_error(me, "invalid space (%d) specified by %s",
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space, device_path(client));
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/* get the bus address */
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device_address_to_attach_address(device_parent(me),
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device_unit_address(me),
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&attach_space,
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&attach_address,
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me);
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if (addr < attach_address)
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device_error(me, "Invalid attach address 0x%lx", (unsigned long)addr);
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device_attach_address(device_parent(me),
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type,
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attach_space,
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addr,
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nr_bytes,
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access,
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client);
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}
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static device_callbacks const hw_iobus_callbacks = {
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{ NULL, },
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{ hw_iobus_attach_address_callback, },
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{ NULL, }, /* IO */
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{ NULL, }, /* DMA */
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{ NULL, }, /* interrupt */
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{ generic_device_unit_decode,
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generic_device_unit_encode,
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generic_device_address_to_attach_address,
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generic_device_size_to_attach_size }
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};
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const device_descriptor hw_iobus_device_descriptor[] = {
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{ "iobus", NULL, &hw_iobus_callbacks },
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{ NULL, },
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};
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#endif /* _HW_IOBUS_ */
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